Question

Dogs stretch out their tongues generally in summer because

Answer 1

Doga have high body temperature. To regulate the body temperature dogs hang out their tongue in summer. Generally mammals regulates their body temperature by sweating. Dogs have fewer sweat gland on their body. So, it is difficult to to cool their body by sweating. By stretching their tongue they cool their body.
Hope it helps..!!!

Answer 2

In summer the body temperature of dogs is high..they feel warm and sweaty..so they stretch their toungues out to perform evpouration..